EP 0502622 A1 19920909 - Image processing method.
Title (en)
Image processing method.
Title (de)
Bildverarbeitungsverfahren.
Title (fr)
Méthode de traitement d'image.
Publication
Application
Priority
GB 9104166 A 19910227
Abstract (en)
A method of digitally processing images, in the form of a two dimensional data element array, in which the image is compressed by dividing the array into blocks (2) and performing transformation thereon. In order to smooth discontinuities at the boundaries (1, 13, 3, 14) between the blocks (2) resulting from the compression, filtering is performed by sequentially scanning elements at the boundaries with a one dimensional operator matrix (6, Fig, 1). The matrix applies suitable weights to those elements and adjacent ones to effect smoothing. <IMAGE>
IPC 1-7
IPC 8 full level
G06T 5/20 (2006.01); G06T 9/00 (2006.01); H04N 1/415 (2006.01); H04N 7/26 (2006.01); H04N 7/30 (2006.01)
CPC (source: EP US)
H04N 19/527 (2014.11 - EP US); H04N 19/86 (2014.11 - EP US)
Citation (search report)
- [A] US 4754492 A 19880628 - MALVAR HENRIQUE S [US]
- [A] US 4941043 A 19900710 - JASS WIELAND [DE]
- [X] NACHRICHTEN TECHNIK ELEKTRONIK, vol. 38, no. 5, May 1988, pages 166-169, Berlin, DE; L. ARNOLD et al.: "Adaptive Transformationscodierung von Grauwertbildern mit vermindertem Blocking-Effect"
Designated contracting state (EPC)
DE FR NL SE
DOCDB simple family (publication)
EP 0502622 A1 19920909; EP 0502622 B1 19951220; DE 69206847 D1 19960201; DE 69206847 T2 19960515; GB 2253318 A 19920902; GB 2253318 B 19940720; GB 9104166 D0 19910417; JP H05110871 A 19930430; US 5220616 A 19930615
DOCDB simple family (application)
EP 92301215 A 19920214; DE 69206847 T 19920214; GB 9104166 A 19910227; JP 4147192 A 19920227; US 84390692 A 19920227